5/10/15 Promotion Program: The Definitive Thread
I earned three C601 certificates through the 5/10/15 promo. I tried to use them for a three night stay at a hotel with no reward availability (plenty of regular availability) through the Diamond Desk. The rep there tells me that I can't use the Diamond Reservation Guarantee with these certificates, but I can use my points for it. She told me that the certificates earned through the promo are only good for rewards reservations with regular availability, and not with the Diamond guarantee.
Is this true? Does anyone else have any experience with this?